Molding compound.



CROSS REFERENCE UNITED STATES PATEnT'orrIoE.

WILLIAM nosnnrs comma, or nunnnic ron, mast-w;

momma comrouma.

No Drawing.

To all whom it may concern.-

Be it known that I, WILLIAM R. CONARD, a. citizen of the'Unit/ed States,residing at Burlington, in the county of Burlington and State of NewJersey, have invented a new and useful Molding Compound, of which thefollowing is a specification.

The object of the present invention is to provide a novel moldingcompound in which the ordinary foundry slag and hydraulic oe-= ment areemployed.

In manufacturing the compound which constitutes the subject matter ofthe present invention, waste material from a foundry cupola or airfurnace, commonly known as foundry sla is employed. The slag is commonlyof a brous nature, andwhen it comes from the furnace in masses too largefor immediate use, I comminute the slag by .crushin t grinding orotherwise, to a fine and pre ferably impalpable powder, although thefineness of the comminuted slag will depend upon the nature'of thecasting which is to be produced.

The slag should be in a dry condition, and if it is moist, either beforeor after being comminuted, it may be dried, either before or after thecomminutiug process takes place. The comminuted slag is then mixed witha hydraulic cement, either natural (Rosendale) or artificial (Portland)cement being employed, the cement, of course, being in a dry condition.-Ordinarily one part of cement and two parts of slag are employed, butconsiderable latitude may be permitted in the proportions of theingredients. The

operator will be guided by the size of the] casting which is to beproduced, and by other conditions which are known in the art.Ordinarily, if the castings which are to be produced, are ofconsiderable dimensions, the amount of cement may be reduced, so as tosecurea more porous aggregate, whereby the gases generated in thecasting operation may readily escape. After the conuninuted slag andcement have been mixed thoroughly, in

a dry condition, water or other liquid is added, in order to make themass plastic. The plastic mass is thoroughly mixed until it is of auniform and homogeneous nature. The aggregate in a moist and plasticcondition, is applied to a. pattern, and in this con-.

nection itis to be understood that the word Specification of LettersPatent. Patented Feb. 18, 19131 Application filed August 6, 1812. SerialNo. 713,890.

pattern is used to designate any element which serves to cause themolten-metal to conform to the shape of the object which'i's to be cast.After. the moistened aggregate has been applied to the pattern, theaggregate is worked into all of the interstices of the pattern, byrubbing, pressing or otherwise, so that all of the lines of the patternare entered by the aggregate. If necessary, the aggregate applied to thepattern may be permitted to take an initial set or a final set, thisstep in the process depending largely upon the amount-of liquid whichhas been introduced into the aggregate. The pattern is then removed fromthe aggregate, the

same now conforming to the pattern, and

EXAMINER consummated either by permittin the mold to dry out in theatmosphere, or y the application of steam, or under the heat. of a fire.

The compound hereinbefore referred to, may be employed with equalpropriety for making the drag, the cope or the core. ,A molding element,constructed as above described, may-be used repeatedly, and theemployment of gaggers W111 be unnecessary.-

Molding elements constructed as above described, will be suitable forcasting in a wide variety of metals, such as iron, bronze or brass,Babbitt, lead and the like, and by the use of the abovespecifiedcompound, a casting will be produced which will be devoid ofimperfections and which will be superficially smooth. Patterns of wood;metal or rubber,

depending upon-the nature of the work, may be coated as above described,and in carrying out the invention, the expense for material and laborwill be reduced to aminimum.

-' Having thus described the invention, what is claimed is':-.

1. .A molding compound comprising comminuted foui dry slag and a binder.

2. A molding compound comprising comminuted, fibrous, foundry slag'andhydraulic cement. L

In testimony thatI claim the foregoing as my own, I have hereto afiixedmy signature in the presence of two witnesses.

WILLIAM ROBERTS CONARD. Witnesses J. STEWART BUGBY, C. W. PRICE.

